Question 1

Osmosis is a type of

Accepted Answer

A)  carrier-mediated transport 
B)  diffusion 
C)  exocytosis 
D)  pinocytosis 
E)  primary active transport 
A)  carrier-mediated transport 
B)  diffusion 
C)  exocytosis 
D)  pinocytosis 
E)  primary active transport

Question 2

During the resting potential

Accepted Answer

A)  K+ ions leave the cell along a concentration gradient and along an electrical gradient. 
B)  K+ ions leave the cell against a concentration gradient but along an electrical gradient. 
C)  Na+ ions enter the cell along a concentration gradient and along an electrical gradient. 
D)  Na+ ions enter the cell along a concentration gradient but against an electrical gradient. 
E)  Cl- ions enter the cell along a concentration gradient and along an electrical gradient. 
A)  K+ ions leave the cell along a concentration gradient and along an electrical gradient. 
B)  K+ ions leave the cell against a concentration gradient but along an electrical gradient. 
C)  Na+ ions enter the cell along a concentration gradient and along an electrical gradient. 
D)  Na+ ions enter the cell along a concentration gradient but against an electrical gradient. 
E)  Cl- ions enter the cell along a concentration gradient and along an electrical gradient.

Question 3

The carbohydrate found in plasma membranes is believed to be involved in the aggregation of cells to form tissue.

Accepted Answer

A) True 
 B)False

Question 4

Which statement about membrane proteins is incorrect?

Accepted Answer

A)  Channels are water-filled pathways. 
B)  Channels are not highly selective. 
C)  Carriers are highly selective. 
D)  CAMs serve as binding sites for specific ions. 
E)  Proteins may work in conjunction with carbohydrates to provide recognition of "self." 
A)  Channels are water-filled pathways. 
B)  Channels are not highly selective. 
C)  Carriers are highly selective. 
D)  CAMs serve as binding sites for specific ions. 
E)  Proteins may work in conjunction with carbohydrates to provide recognition of "self."

Question 5

Pinocytosis is a form of

Accepted Answer

A)  active transport 
B)  cytokinesis 
C)  endocytosis 
D)  exocytosis 
E)  hemolysis 
A)  active transport 
B)  cytokinesis 
C)  endocytosis 
D)  exocytosis 
E)  hemolysis

Question 6

Complete each of the following statments.
Opening a sodium channel during the resting membrane potential will cause the potential to become less ____________________.

Accepted Answer

The answer of Complete each of the following statments.
Opening a...

Question 7

Oxygen gas, cholesterol, and glucose molecules are lipid-soluble, whereas proteins, amino acids, and ions are water-soluble.

Accepted Answer

A) True 
 B)False

Question 8

Complete each of the following statments.
Of the lipids in the plasma membrane, ____________________ are most abundant, with lesser amounts of ____________________.

Accepted Answer

phospholip

Question 9

If a typical body cell is placed into a 1% saline solution, the cell

Accepted Answer

A)  will gain more water than it loses 
B)  has a higher osmotic pressure than the ECF 
C)  has a lower hydrostatic pressure than the ECF 
D)  will gain and lose water at the same rate 
E)  none of these 
A)  will gain more water than it loses 
B)  has a higher osmotic pressure than the ECF 
C)  has a lower hydrostatic pressure than the ECF 
D)  will gain and lose water at the same rate 
E)  none of these

Question 10

Which one of the following requires the cell to expend energy?

Accepted Answer

A)  ECF moving into a cell via pinocytosis 
B)  glucose moving through a facilitated diffusion carrier 
C)  K+ ions moving out of a cell 
D)  water moving through an aquaporin 
E)  Na+ ions moving through a leak channel 
A)  ECF moving into a cell via pinocytosis 
B)  glucose moving through a facilitated diffusion carrier 
C)  K+ ions moving out of a cell 
D)  water moving through an aquaporin 
E)  Na+ ions moving through a leak channel

Question 11

Use the figure above to answer the corresponding questions. Assume the membrane is always permeable to water.
In beaker 1, the solution on the right side of the membrane
  
a.	could eventually have the same concentration of green solute particles as the solution on the left side of the membrane
b.	could eventually have the same osmolarity as the solution on the left side of the membrane
c.	currently has a lower osmotic pressure than the solution on the left side of the membrane
d.	is currently losing water
e.	all of these

Accepted Answer

The answer of Use the figure above to answer the...

Question 12

Phosphorylation of a carrier can alter the affinity of its binding sites, accompanied by a change in its conformation.

Accepted Answer

A) True 
 B)False

Question 13

Integrins

Accepted Answer

A)  create a filamentous meshwork in the inner surface of the membrane 
B)  act as membrane-bounded enzymes 
C)  are used for cell recognition purposes 
D)  span the membrane, providing a mechanical link between the outer membrane and the cell's surrounding 
E)  none of these 
A)  create a filamentous meshwork in the inner surface of the membrane 
B)  act as membrane-bounded enzymes 
C)  are used for cell recognition purposes 
D)  span the membrane, providing a mechanical link between the outer membrane and the cell's surrounding 
E)  none of these

Question 14

Two ATP molecules could provide energy for a sodium-potassium pump to move ____ ions out of the cell for every ____ ions it moves into the cell.

Accepted Answer

A)  6 Na+; 3 K+ 
B)  2 Na+; 3 K+ 
C)  3 K+; 6 Na+ 
D)  3 K+; 2 Na+ 
E)  12 Na+; 6 K+ 
A)  6 Na+; 3 K+ 
B)  2 Na+; 3 K+ 
C)  3 K+; 6 Na+ 
D)  3 K+; 2 Na+ 
E)  12 Na+; 6 K+

Question 15

Complete each of the following statments.
In ____________________ diffusion, water-soluble materials move through specific channels in the cell membrane.

Accepted Answer

The answer of Complete each of the following statments.
In ____________________...

Question 16

Some cell adhesion molecules are peripheral proteins and some are integral proteins.

Accepted Answer

A) True 
 B)False

Question 17

All of the following transport certain substances from regions of high concentration to low concentration except

Accepted Answer

A)  carriers 
B)  facilitated diffusion 
C)  SGLT 
D)  GLUT 
E)  Ca2+ pump 
A)  carriers 
B)  facilitated diffusion 
C)  SGLT 
D)  GLUT 
E)  Ca2+ pump

Question 18

Use the figure above to answer the corresponding questions. Assume the membrane is always permeable to water.
In beaker 1, the solution on the right side of the membrane
  
a.	has a lower osmolarity than the solution on the left side of the membrane
b.	will gain water from the solution on the left side of the membrane
c.	has a higher osmotic pressure than the solution on the left side of the membrane
d.	has a lower osmolarity than the solution on the left side of the membrane and will gain water from the solution on the left side of the membrane
e.	will gain water from the solution on the left side of the membrane and has a higher osmotic pressure than the solution on the left side of the membrane

Accepted Answer

The answer of Use the figure above to answer the...

Question 19

Large, anionic intracellular proteins (A-) cannot pass through carriers because A- proteins are

Accepted Answer

A)  greater than 0.8 nm in diameter 
B)  lipid soluble 
C)  in about the same concentration in the cytosol and ECF 
D)  not water soluble 
E)  lipid soluble and not water soluble 
A)  greater than 0.8 nm in diameter 
B)  lipid soluble 
C)  in about the same concentration in the cytosol and ECF 
D)  not water soluble 
E)  lipid soluble and not water soluble

Question 20

Osmosis does not occur if the concentration gradients for water and solutes are absent in a system.

Accepted Answer

A) True 
 B)False

Exam 3: The Plasma Membrane and Membrane Potential

Osmosis is a type of

During the resting potential

The carbohydrate found in plasma membranes is believed to be involved in the aggregation of cells to form tissue.

Which statement about membrane proteins is incorrect?

Pinocytosis is a form of

Complete each of the following statments. Opening a sodium channel during the resting membrane potential will cause the potential to become less ____________________.

Oxygen gas, cholesterol, and glucose molecules are lipid-soluble, whereas proteins, amino acids, and ions are water-soluble.

Complete each of the following statments. Of the lipids in the plasma membrane, ____________________ are most abundant, with lesser amounts of ____________________.

If a typical body cell is placed into a 1% saline solution, the cell

Which one of the following requires the cell to expend energy?

Phosphorylation of a carrier can alter the affinity of its binding sites, accompanied by a change in its conformation.

Integrins

Two ATP molecules could provide energy for a sodium-potassium pump to move ____ ions out of the cell for every ____ ions it moves into the cell.

Complete each of the following statments. In ____________________ diffusion, water-soluble materials move through specific channels in the cell membrane.

Some cell adhesion molecules are peripheral proteins and some are integral proteins.

All of the following transport certain substances from regions of high concentration to low concentration except

Large, anionic intracellular proteins (A-) cannot pass through carriers because A- proteins are

Osmosis does not occur if the concentration gradients for water and solutes are absent in a system.

Introduction to Physiology and Homeostasis

Cell Physiology

Principles of Neural and Hormonal Communication

A--The Central Nervous System

B--The Central Nervous System

A--The Peripheral Nervous System: Afferent Division; Special Senses

B--The Peripheral Nervous System: Afferent Division; Special Senses

The Peripheral Nervous System: Efferent Division

A--Muscle Physiology

B--Muscle Physiology

A--Cardiac Physiology

B--Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

A--The Respiratory System

B--The Respiratory System

A--The Urinary System

B--The Urinary System

A--Fluid and Acid-Base Balance

B--Fluid and Acid-Base Balance

A--The Digestive System

B--The Digestive System

Energy Balance and Temperature Regulation

A--Principles of Endocrinology: the Central Endocrine Glands

B--Principles of Endocrinology: the Central Endocrine Glands

A--The Peripheral Endocrine Glands

B--The Peripheral Endocrine Glands

A--The Reproductive System

B--The Reproductive System

Filters

Complete each of the following statments. Of the lipids in the plasma membrane, are most abundant, with lesser amounts of .

Two ATP molecules could provide energy for a sodium-potassium pump to move ions out of the cell for every ions it moves into the cell.

Large, anionic intracellular proteins (A^-) cannot pass through carriers because A^- proteins are